Grinding



provided on'their outer sides with the -hori-,

UNITED STATES PATENT OFFICE.

EDWARD T. WILLIAMS, OF CARROLLTON, KENTUCKY.

GRINDING-L-MILL.

. SPECIFICATION forming part of Letters ratem No. 400,533, dated April2, 1889.

Application filed February 12, 1887. Serial No. 227,408. (No model.)

To all whom it may concern.-

Be it known that I, EDWARD T. WILLIAMS, a citizen of the United States,residing at Carrollton, in the county of Carroll and State of Kentucky,have invented a new and useful Improvement in Grinding-Mills, 'of whichthe following is a specification.

'The invention relates to improvements in grinding-mills; and itconsists in the construction andnovel combination of parts hereinafterdescribed, and pointed out in the appended claim.

In the drawings, Figure l is a plan view of a grinding-mill having theinvention attached. Fig. 2 is a perspective view of the adjustingmechanism for the movable roller. Fig.3 is a detail sectional view onthe line y y of Fig. 1. Fig. 4 is a side view of the rollers andadjusting mechanism. Fig. 5 is a detail transverse section on'the line zz of Fig. 3.

Referring to the drawings by letter, A designates the main casing,having secured to it the bearing-blocks B for the journals of the roller0. This roller has at its ends the cams D, which bear against theanti-friction rollers E. This construction is preferable; but the camsand anti-friction rollers form no part of the invention. 1

F Fdesignate a pair of longitudinally-moving bearing-blocks, which areto rest uponthe' upper sides of the inclosing-case A, and are zontalarmsG, which enter and are guided in keepers H, that are secured to theupper ends of the inc1osing-case. From the upper sides of the arms Gproject studs 1. The vertical end walls, h, of the keepershave theiropposing sides arranged parallel, as shown in Fig. 1.

K designates a pair of slide blocks or keys, which are each providedwith an oblique slot, L, that is open at one end. The said slide blocksor keys are arranged transversely in the-keepers, and the studs I enterthe oblique slots of the said sliding blocks or keys. It will beunderstood by reference to Fig. 3 that when the blocks or keys K aremoved inwardly the oblique slots cause the studs I to be movedoutwardly, and thereby draw the bearing-blocks F from the bearing-blocksB. By moving the sliding blocks or keys in the contrary direction thebearing-boxes F will be moved toward the blocks B.

M Mdesignate springs which bear against the outer sides of the. blocksor keys K and permit yield of the rolls and boxes.

0 designates a roller similar to the roller 0, and journaled on thebearing-boxes F. The roller 0' has preferably at its ends the cams P,which bear against the anti-friction rollers R, which cams and rollersare respectively similar to the cams D and anti-friction rollers E, andwhich form no part of the invention.

By means of the longitudinally-movable bearing-blocks F and the slideblocks or keys K the bearing-blocks F and, consequently, the rollerO,may be moved toward or from the roller 0 and secured at any desiredadjustment in relation thereto.

In order to move the adjusting blocks or keys readily and effect a fineadjustment of the roller, I provide the inclosing-case on its sides withoutwardly-extending angle-arms S, which have threaded openings in theirouter upturned ends, and provide adj usting-screws T, which work in thesaid threaded openings and have their inner ends swiveled to the slideblocks or keys. The function of the springs M is to permit the roller 0to move outwardly from the roller 0 in the event that any hard foreignsubstance should be fed between said rollers with the wheat.

Having described my invention, I claim- The combination of the case A,the roller 0, and the roller 0, the movable bearings F for said roller0, provided with the arms G, having the upwardly-projecting studs I, thekeepers H, secured to the upper edges of the casing and guiding the armsG, the slideblocks K, resting transversely in the keepers and providedwith oblique slots L to receive the corresponding studs, I, thebearing-brackets S, secured to and standing out from the sides of thecasing, the adjusting-screws T, passing through threaded openings insaid brackets and having their inner ends swiveled in the outer ends ofthe blocks K, so that they will move the blocks either inward oroutward, and the leaf springs M, bearing against the keepers and theslide-blocks, substantially as specified.

In testimony that I claim the foregoing as my own I have hereto affixedmy signature in presence of two witnesses.

EDWARD T. WILLIAMS.

Witnesses:

S. G. WILLIAMS, J AS. G. FOSTER.

